With the announcement of the StarCraft remake, I think it's safe to assume they will do others. Blizzard loves to repackage old content and sell it back to its customers. They've been doing it in Wow for years.
Edit: I just wanted to clarify for everyone, I'm glad they're remastering old games. I just like to give Blizz a hard time because they do repackage old content and sell it again.