The Ninja Turtles arcade games are even being put on TMNT (Next Gen) 2
Though I dont think the 3rd NES TMNT game was on arcades...the 1st one would be nice to have.
Disney should have Capcom put all the Disney games on the classic series. Like both Chip n' Dale games, both Duck Tales games, Tale Spin and what not.
Maybe the Japanese version of Super Mario Bros. 2 Yes, it is on SMBDX, but its not with its regular graphics,and apparently, there were levels removed from the GBC version. So it WOULD make sense to put it on the series.
All the Rare games should be put on the series, unless theres arcade versions or if Rare is doing remakes of Snake, Rattle & Roll, Battletoads etc.