Will Heavy Magic Return to the Realms

I have been noticing that with the new 4th edition Dungeons and Dragons and the future changes of the Forgotten Realms. Like the return of the Empire of Netheral the death of Mystra in 1385 DR Year of the Blue Fire, will heavy magic return to the Realms. I think yes, the weave will be more malleable and with the way the current game and future game of DnD is played it should be easy to make the rules work for heavy magic. Now I think this is more true because of the epic magic that is already used. Perhaps they will just call epic magic heavy magic. It will be interesting to see what unfolds.