How about, y'know, the artist don't "emulate" anything. I mean, the very concept sickens me, as an artist of a mediocre calibre myself, why the FUG would we be "emulating" some other, previous period of art?
Surely, the precise reason you hire artists with their own skills and vision is so that they can display those, rather than mindlessly "emulating" the work of other artists of the past. I mean, what do we want someone to forge Larry Elmore's style or something now? This "emulation" concept really blows my mind.
So, NO no no no no and thousand times NO to emulating any previous style. Yes to artists doing art, and doing so in their own style. High-quality art with a lot of effort put into it and good art direction (hopefully beyond "Make it look like Larry Elmore guys, or you're all fired!") is what 4E needs, not some horrible retro look designed to appeal to people who started playing before I was even BORN (1978 fyi). Particularly when said artists frequently appeared to have extremely poor grasps on colour theory (looking at you, Elmore) and/or making people not all look exactly the same as each other.