If fusion is possible, plasma is possible. If creating something that bends, like forcefield, then anti gravity is possible. If anti gravity is possible, then time travel is by then, possible.

Many times have we believed that it is impossible for this and that, but now, look at it. The weapon tech for example, is from pure material(think bullets) is now even using laser beams, and now, rail guns are developed. If they can fusionize things, then, i believe that one day, bending time will be realistic. My two cents though