Whoops. Forgot the silly little link.

http://www.vsrealms.com/forum/showthread.php?t=53434&highlight=hats+clouds 

Here we go. Hats n' Clouds. The area I particularly want to point at is the part about At Their Finest. It creates a modifier exactly like Royal Flush Gang (Bats and Sups you control gets +2/+2). A level 2 judge with the username dschneider hits all the questions asked and states that a Superman played after At Their Finest has resolved will get its modifier. HeroComplex, who is part of UDE's rule people, goes on to say that he is glad to see ATF working much cleaner now, meaning he did not see anything wrong with that answer.

In the same way, RFG also creates a cloud with its entering play effect that any following recruited RFG also enter and will get the effect from. 

*sigh* I'm absolutely certain that I've got my ducks in a line here.

It IS a coming into play effect. It's a coming into play effect that CREATES a cloud. Just like playing Robotic Offensive creates a cloud, so does the recruiting of a Royal Flush Gang. The first RFG recruited creates a cloud, the next one that enters play fulfills the requirement to gain the effect of the cloud (being a Royal Flush Gang member) and gets +1 attack.

I'll go dig up the Realms post where one of the people who works on the UDE game rulings explains why you can play The Next Brotherhood with five resources and have it activate when you drop to four. It explains how the resolving of the effect creates the cloud's sort of "delayed trigger" which then activates when you drop below five resources.

And the reason your stuff came out stuck together is because this site has really weird formatting.

I  don't think it works that way. You seefirst of all Spider Hunt was used after all characters hadbeen recruited so that they wouldn't miss on the ATK bonus, the ATKbonus is what lasts all turn not Spider Hunt giving the ATK bonus. Second T.Next B. power is based on the condition there are 4 resources or less, if the 4resource or less condition is met than the ATK bonus is given to allBrotherhood characters. You can play a T. Next B., let it resolve and then NUKEa fifth resource with lets say Avalanche coming into play, and thecharacters wont get the bonus because at the Time T. Next B. resolved you had 5resources. If you played it after Avalanche came into play then yes you'd getthe ATK bonus. This works very differently than The New Brotherhood as it wasan Ongoing Plot Twist, and it didn't matter the order of play as long as youhad 4 resources or less. If you look at the example given after the rules thatyou posted of hats and clouds: 

Example: Robotic Offensivereads, “Choose an affiliation. Opposing characters with that affiliation get -2DEF while in combat with Army Doom characters you control this turn.” As thiseffect resolves, it creates a “cloud” that:

Initially affected characters can stop beingaffected by if they change control or lose the chosen affiliation (they don'tkeep their “hats”)

Characters that enter an opponent’s control orgain the chosen affiliation later can still be affected by (they didn't missout on a “hat”)

Charactersin combat get the -2 DEF because the cloud affects them while they are incombat with an army Doom character, even if they weren't in play at the timeRobotic Offensive resolved.

What youhave here with The Royal Flush Gang has a come into play effect and as such:

         100.1     The player physically places thecard into play, making it an object, and processes any "enters playexhausted," “enters play stunned” (see rule 214.4), and/or "entersplay with counters" modifiers.

         By this I understand thatyou can't give the characters that you haven't recruited yet the bonus from theother characters you did recruited. So what you'll have is a ladder ofcharacters with 9/1, 8/1, 7/1, 6/1, and 4/1 assuming the last RGF yourecruited is the one that leaves play with Bodyslide, hence it will loose itsoriginal +1 ATK bonus.

        I might be wrong, and welcomeanyone that can clear this up, but I think I'm right on this. 

Found it! It's in the Marvel Legends rulebook:

I'm still not 100% certain about the technical wording of hats/clouds myself but I'll see if I can't mangle out what I know. Apparently, "while" effects are considered to last all turn.

The original example I read was The Next Brotherhood from MVL. It says that while you have four or less resources, blah blah blah. From my understanding, it is legal to play this card when you have five resources, then nuke one of your resources and get the +2 attack. That's because The Next Brotherhood's effect remains inplay the entire turn (the idea being that it is a "cloud" on the battlefield, from what I can tell). Same thing with Spidey Hunt. For example, you KO your resource and then recruit a SinSyn character. That SinSyn still gets the +2 attack because the effect lasts all turn.

In the same way, playing a Royal Flush Gang member creates an effect all turn that doesn't specifically target. Therefore, each Royal Flush Gang that comes into play effects following Royal Flush-ers.

I'll see if I can't dig up a link to the original thread I read all this in. I also believe its in the updated Comprehensive Rulebook that's been recently posted. Not sure. I'm not much of a ruling fiend, I just pick stuff up as I go along.