Maybe Caledonia, but I think it's too small and undeveloped to be bothered with.
Oakville isn't even a part of Peel region, it's part of Halton, so it definitely wouldn't be swallowed.
If anything Oakville and Burlington would be amalgamated with Hamilton.
Of course, no one can tell where any of them stops and the next one starts, much as folks can't tell whether a SC or MP is in TO, 'Sauga or Brampton. And if you're a Preem set on dismantling the Regional Municipality of Peel, or the Regional Municipality of Metropolitan Toronto, what do you care where the boundaries are? You're re-drawing the whole thing.
But wouldn't it be nice, if just for once, one of these guys (and that includes Mayor Crombie) actually had a considered plan that was thorough and thought through enough to need more than a single napkin?