50 million years from now (if we continue present-day plate motions) the Atlantic will widen, Africa will collide with Europe closing the Mediterranean, Australia will collide with S.E. Asia, and California will slide northward up the coast to Alaska. Note the position of Baja, California to the far right.
150 million years from now, the Atlantic Ocean may start to close as new subduction zones along the eastern coasts of North America and South America begin to consume the ocean floor the now separates North American from Africa.
250 million years from the next Pangea, "Pangea Ultima" may form as the subduction of the Atlantic ocean continuess. This supercontinent could have a small ocean basin trapped at its center.
Source: Christopher Scotese, Paleomap Project