time to play fear & fantasy:
What if phone call transcript comes out and it’s completely innocuous?
 my fear: trump (or more likely someone around him) is playing 3D chess.  they knew the Dems would go ape-shit for a whistleblower story, so when they got a weak-sauce complaint that won't stick, they made a big dog-n-pony show of saying it exists but not releasing it, Dems bit hook line and sinker, and the grand finally: a weak-sauce complaint.  cue the sad trombones, Dems have egg on their face, trump cruises to a reelection on the platform of "see how insane and self-deluded those donkeys are."
my fantasy: there is a "there" there, but the complaint + transcription aren't quite enough to seal the deal.  Pence, in the sidelines, sees his big chance: he leaks some info/tapes/etc., trump is carted away, and he achieves his life-long dream of being president.  but wait, there's more!  pence's role as the leaker is discovered, he himself is impeached and removed, and Pelosi becomes acting prez for a short time until Nov 2020 when someone sane takes over the Oval Office.  cue the credits.