When Monica gets her groove back, there's no question she'll be a fixture in the top 20, maybe even the top 10. With Clijsters out, Henin and Venus in question (and definitely 100% for RG), Capriati struggling this year, Davenport never playing well on the red dirt, and Serena with her knee potentially, Monica has the chance to go extremely far.
She'll get a special seeding for RG, but a lot has to do with her draw. If she gets some no name player ranked 70 or 80, she'll win. It may take a set to get into it, but she'll win.
If she draws a clay court player who's been hot this year like Emilie Loit or Sanchez Lorenzo or Jelena Kostanic...maybe not.
However, Monica has a lengthy history of kicking some serious ass after long layoffs. There's no reason why that trend shouldn't continue.