I don't even want to think about remaking DP before RS. But what gen IV has going for it that previous gens don't is that it still has wifi capabilities. So it just feels less necessary to give them remakes. However, I think a DP remake would do them some good. As of now, it seems the least fave gen is gen IV (however DURING gen IV, everyone hated III and loved II. the love moved to III and the hate moved to IV. weird how that happens, right?), but I really think remaking it would give us a chance to have those flaws fixed and enjoy DP. However, if we're gonna remake them, I'd prefer that it be Platinum, or at least incorporate things from Platinum, like the regional dex.
HGSS are remakes, and like I always say when people think we should remake FRLG, why would you remake a remake? Just no.