Millenium made it clear that it was using ST'09-style multiverse theory for it's time travel, and not the single-stream universe model.
Rather, Millennium and ST'09 were both based on plausible science and quantum theory. The Reeves-Stevenses have always been among the most hard-science-oriented Trek novelists, and Kurtzman & Orci are pretty sciene-literate themselves. The multiple-timelines model is the one that actually makes scientific sense.
IIRC, according to "Watching the Clock", the timelines reconverge once all the changes made, and their effects, stop mattering - in this case it'd be the distant future.And I explained in Watching the Clock how there's really no contradiction between the two models -- changing the past does create a separate timeline, and has to, because by definition two versions of the same moment in time coexist simultaneously. It's nonsense to say one version of today comes before another version of today, because they're both at the same time. The "change" comes at the moment of the original time travel, when the two timelines that coexisted from the moment of the branching reconverge back into one, with only the events of the altered timeline being remembered. So "altering the original timeline" is really just a special case of "creating branching timelines," one where the branches eventually reconverge.
So does your model assume that the Abrams timeline will overwrite the prime timeline (i.e. reconverge with it) at the moment Nero and Spock Prime travel back? If not, how is that different, in your view?
Not in that case. What I asserted was that the reconvergence only happened if there was a two-way interaction between the timelines, if matter, energy, or information was exchanged in both directions. In that case they were mutually "drawn" into alignment. But if the exchange was only one-way -- if, say, someone fell through a black hole into another timeline and nothing came back in the other direction (because nothing can come out of a black hole) -- then both timelines could survive, although the altered timeline could be influenced to evolve in a similar direction to the original (say, by having the same bunch of people coincidentally end up meeting each other and serving on the same starship).