I was joking about that mech suit thing, lol, but you never know. When Heavensward came out, they were actually going to direct Summoner into becoming Bahamut, starting with the Dreadwyrm Trance, and when they got backlash, one of the statements they made during Stormblood was that "we learned that Summoner players didn't actually want to become bahamut. They just want to summon him." Or something to that nature, so who knows what will happen in the future.