A new Medal of Honor game is coming out. This much is obvious. All we need is official confirmation - and Electronic Arts is preparing to do just that on 6th March.
Various US-based websites have received an invitation to a press event on that very date, timed for 8:00pm PST (or 4:00am GMT). The invites themselves featured an insignia found on a leaflet during Battlefield 3's release.
The speculation is that the announcement will be made at an off-site event during next month's Game Developer Conference. We'll have to wait and see about that.