Put them in various stages of incomplete painting... to match the others.
j/k (maybe)
To me it's the furniture that looks to need painting the most (the half coardboard furniture had a lot of colors, after all), whereas the character miniatures I'm not so sure about.
It is tempting to give the female heroes a shade of blue (and "Mentor" midnight blue) and the Bard a shade of green to match the monsters.
Despite the cool factor of having the Witch Lord as undead color, he feels more natural as gray to me. Ditto for Sir Ragnar.
If I did paint the characters, somehow I would want to retain at least a tribute to the plastic colors, so the Wizard would have a red cloak, etc. Maybe the Barbarian would have a "bloody edge" to his sword.
Or I could just leave the bases as bare plastic to retain the color coding. It's tempting to convert them all into square bases.
I guess the base colors were part of the nostalgia of the original but since I have no such nostalgia for these new designs, something is lost by painting them up all fancy, like. Still undecided overall if I had to choose.
Of course my set hasn't arrived yet, so who knows if I'm evening keeping it for myself or gifting it to another. A friend who was holding my spare classic set wants to mail that to me, so I'll have more sets than I know what to do with at a certain point, even if I am curious about the new content.
Post pics, whatever you decide to do...