Toyota does have two potential aces up their sleeve to survive the transition: automotive industries are far larger and far much more of a point of national pride and therefore are more likely to be bailed out, and their partnership with Panasonic (although see
@neroden's post about Panasonic potentially angling to sell their battery division off, although there is the whole thing where Japan tends to only let that kind of thing happen if a company is in dire financial straits).
Ford's also got one - simply piggybacking on Volkswagen's transition, and Volkswagen is IMO the best-positioned of the ICE manufacturers to make the transition thanks to Dieselgate and the reprioritization that came in its wake. (That's something that came about after I bought a put option against Ford... should've sold my most recent purchase right before Ford's earnings, but oh well.) That said, Volkswagen's got a tough road - Electrify America seems to be the same sugar as the existing third-party DCFC networks, just more of it, and there's still not a good answer for batteries for VW.
Honda... Honda's never been good at anything that didn't have an engine in it (and lately they're not even good at engines).
GM is too dependent on LG to supply them with their EV technology. They have some homegrown tech, but...