Dodge in the late 00's:See, this is the problem. None of the brands are volunteering to be the "volume" brand, and the fans of a particular brand tend to want some other brand to be the volume brand so their favorite can be the higher end one (sort of like the brand chiefs, to be honest). FCA doesn't HAVE a volume brand right now. At all. The de-facto highest selling brand seems to be Jeep, but even though it's "the" volume brand right now, it's not "a" volume brand. Especially with them dropping 2WD models, it's going back to the rough-road brand. As @eastcoaster mentioned, FIAT or Plymouth would be good as a mainstream volume brand..but FIAT is going to become a boutique electric brand in the US, and Plymouth is as dead as the rock it's named for. Reintroducing Peugeot or Citroen would take too long and cost too much. I honestly think Chrysler is the best "mainstream" candidate, based on the fact that their sole product is a minivan now that the 300 is going away. They really don't have an identity right now, and a relatively blank slate is just easier to work with.
Now I do NOT think a "Chrysler Hornet" is in the cards. Unfortunate, but I don't think they can get the price down far enough if they're still building them in Italy, they'd have to set up production here. But a FIAT 500X could be easily restyled and re-badged. And frankly, the wide Chrysler wing is a drop-in replacement for the FIAT "mustache" and logo. Style it to look like a mini Pacifica, and call it the Voyager, or the Cirrus, or the Neon. Or just call it the Chrysler 500, and rename the Pacifica to the Chrysler 1000.
Though come to think of it, I think I prefer a "Chrysler Hornet" of some sort, and the plug-in hybrid version would sit well next to the Pacifica Hybrid. Or maybe not the Hornet, maybe a 2WD Hybrid Compass derivative (we don't get the hybrid Compass here, so it's an opportunity). But then you've got three very similar vehicles sharing the same showroom/lot space. And that worked out SO well for GM....
Dodge in early 20's:
Seems we HAD a volume leader and the various corporate owners decided to strip Dodge of its identity and create an entirely new one that now makes no sense in today's market.