Trump has never said bigly. He always says big league. You can hear the “g” sound. Plus, he wrote “big league” out a couple of times in his 1997 book, The Art of the Comeback.
I guarantee you he will, just to poke fun at the other side and a little bit of poking fun at himself, at least once in the next 8 years.
Dude is hilarious when he does an imitation of himself.