It boils down to this: the line to procure the nomination is 1237 delegates. If they make it, they're in. If all the candidates fall short then it becomes a brokered convention. It may not be the candidate with the most delegates that wins if the others make a deal and combine theirs to get the majority.
That setup may not please the lead candidate, but tough crap. The threshold was 1237, you knew the rules ahead of time. Anything else is loser territory. and you take your chances. No pissing, crying, bitching or moaning is going to change that.
Which means the hard core Trumpets who are already doing victory laps need to end the frat boy dick dominance overconfidence parade and get their guy elected. That's going to take hard work, strategy, ground game, leadership, stamina, and possibly having to make deals with other factions of the party, which is what Trump claims to be an expert at.
And I'm fine with that. Trump talks the big talk, so I want this to go to the wire and see if he's got the grit to get it out there and earn it, not just dictate it into being.