A brokered convention (I'm afraid you're right on this) will likely put a relative "moderate" out in front.
This is Hillary Clinton's plan.
That's bad for Trump because that's what the party rulers want-and so do much of the media.They know the 3 leading candidates are so far to the left that they're losers.
Don't be so sure. Conventional wisdom said Trump couldn't win. Traditional wisdom said Reagan couldn't win. OTOH, McCain and Romney were electable.
I hope they pick a nice, electable candidate. That's President Trump's ticket to victory.