Though an exact plot has not yet been worked out, Steven Spielberg has announced that he will direct a film based on Caltech physicist Kip Thorne's theories of gravity fields:
Based on real science, the film will explore the mind-bending territory of black holes and gravity waves and touch on some of the hypotheses that Albert Einstein chased but never could prove.
The article also notes the other projects Spielberg has offered as possibilities for his next film, including Indiana Jones 4 and an untitled Abraham Lincoln biopic. I'm hoping this means that we have at least a fifty-fifty shot of seeing a time-traveling Lincoln zipping through wormholes to free the slaves and stop Booth from shooting him. Either that, or Indiana Jones and the Proposed Theory of Gravity Fields.