Nope. This "stalking horse" or "trojan horse" conspiracy nut crap has floated up (and you know what floats, right?) in at least the last couple of elections -- this or that (usually temporarily front-running) candidate is a "stalking horse" or "trojan horse" for the "real" candidate, who was selected by some unspecified (fictional, imaginary, delusional) process by some mostly unnamed cadre of all-powerful conspirators.
Trump has peeled away a lot of formerly undecideds or uninvolved (and mostly low-info) potential voters, because he's already very well known. He'll crater the prospects for the various minor candidates, but because he's rich himself, won't soak up potential fundraising dollars from the major candidates who run competent campaigns.
Meanwhile, Christie will draw blue-Pubbies who don't like Bush, Kasich and Graham will draw blue-Pubbies (and Log Cabin types) who don't like Christie, Perry will draw from all four of them. The Donald can't actually beat anyone else in the race, but polls well, draws headlines, and (perhaps most importantly) draws fire. At best, he'll wind up VP running mate.
That's really funny. Could you imagine Trump as a VP?
Now imagine the President stupid enough to put him on the ticket.