That means that BFG will have to compete with Star Wars Armada/X-wing (which is really popular) while Mordheim, BloodBowl, Epic and Warmaster have no serious competition that I know of so I guess they will probably make a return with minor changes?
Blood Bowl = Dreadball & Guild Ball that have all started to gain their own following (some players are ex-BB, some never played BB, some still play it [me!]).
Mordheim = Frostgrave is a new game that has got a small but expanding fan base, again made up of ex-, never- and still- Mordheim players.
Epic = I can see Dropzone Commander being competition, especially if big "robots" are ever added.
BFG might also get competition from Dropfleet Commander which has recently funded (big time!) on Kickstarter.
That said, I don't think those games need major changes - I find games like Dreadball, Guild Ball and Frostgrave (which I all play) have their own feel while still being in the same ballpark