Timeline wise, it would likely be a Hoenn revisit, and not a remake.
Originally Posted by SmoG878
PMD has a few gen 4 Pokemon. The spin-offs featured, but were not focused on, gen 4 Pokemon.
Originally Posted by Indragon
On a 3rd Gen Game (Temporarily Unavailable for Trade-Missing DS with a GBA Slot): Bonus Disk Jirachi, 10 ANIV Celebi, 10 ANIV Typhlosion, 10 ANIV Suicune, 10 ANIV Espeon, MYSTRY Mew, XD Lugia
On a 4th Gen Game: ALAMOS Darkrai, Japanese Member Card Darkrai, Zoroark Movie Scizor, 11219 Mew, NZ Jirachi, Japanese Regigagas to activate the event
On a 5th Gen Game: GAMESTOP Suicune, May 2012 Darkrai x 3, June 2012 Victini x 2, Spring 2012 Reshiram, Spring 2012 Zekrom, 2012 Arceus, Liberty Island Victini