I'm confident that Biden, Bloomberg, Buttegieg and Warren will work out a deal to have a nominee...

[FBaggins]

17. Again... you should read the OP

The scenario is not only clear, it's also the same one that has been fretted over here for some time now. The OP is worried that Sanders will do well enough in the early states to change the dynamic of the race... and end up with a likely plurality (but perhaps not an outright majority) of the delegates as the convention approaches. The OP likely fears both a Sanders nomination and a contested convention where Sanders' supporters balk at the candidate with the most voted not getting the nomination.

I share those fears... but don't think that a "deal" between the non-Sanders candidates like what you're speculating on can fix it. One obvious rebuttal to the "they'll just coordinate bowing out and supporting someone else" is the fact that by far the largest portion of Warren's supporters have Sanders as their clear second choice. No "deal" that she can cut to get out of the race does anything to avoid a Sanders candidacy. The calendar also works against this theory. Even were they not suffering under their own egos (almost universal among political candidates), if they aren't out well before Super Tuesday, their selected champion (still wondering who the OP thinks that will be) still doesn't get a clear majority.