It'd be really weird if Oda retconned its paramecia status, or the fact that Luffy is rubber. Those are staples of his power and character.
It obviously can't be a logia, because logias are producers from the get go. It can't be a Zooan, because Zooan awakening has nothing to do with the environment. He's obviously going for the Doflamingo/Katakuri type of awakening, not some Zooan transformation/recovery or whatever.
Maybe all he's doing is changing the name. Fujitora's DF is not named "Gravity Gravity no Mi". Jozu's DF is not named "Diamond Diamond no Mi". Maybe this is just the "Bounce Bounce" fruit or something.
Also it'd be weird since all of Luffy's moves started with "Gomu Gomu", and his number is 56 "GoMu".