Maybe, but the problem is how many 8 year olds actually read the mag? They are better served by matchday programmes for that sort of thing. Plus now the mag is properly bound, it's a lot harder to "pull out"!
When RLW used to do the pull out posters it was a jack of all trades mag, and consequently was a master of none. It instantly reduces the gravitas of the mag in the readers mind, regardless of the rest of the actual content. It would be ok if RL had a "Match" style mag, as that's where you would expect posters of football stars - after all you don't see posters of players in Four Four Two. Of course RL is nowhere near popular enough to sustain that sort of kids mag.
Since they got rid of the posters and the like, RLW is a much more focused and considered magazine - and all the better for it (IMO). I'm sure if John has a massive outpouring weeping for their return, they would be back. I wouldn't hold your breath though as I think it is the first and only time it has been brought up.