I havn't played a ton of this game but it seems interesting and fun. Especially with a bunch of the classic wrestlers. It got me thinking how they could do a sequel then it hit me watching a documentary on Netflix about the Rise and Fall of WCW. Instead of them reaching back and going for WWE Legends, go back and make a "retro" 90's game with the best wrestlers from WWF vs. WCW. This was really the height of wrestling and would be awesome to see them translate that era into a videogame. I am sure WWE can get enough of a roster to make this happen. They can still have current WWE wrestlers in it but it can let you play out some classic feuds and dream matches between the two federations. Doing an ECW DLC pack could be pretty cool too. Here is a jist of the rosters on both sides excluding current wrestlers.
 

WWE RAW   

I'd play it.