For what should be contained in a TOE, please view Ultimate Theory of Everything . A lot of raw topics with potential for further research are contained there. Occurrence of quantities different to 3-D real spatial values. Dimensions required 4-D only. The 4th D is exhibited as matter-energy.
Time is separated.
Time is assumed able to be joined with spatial dimensions just to make motion-related calculations convenient. Big Bangs with unknowns. Strings and energies existed since Big Bangs. The presence of i -values and their motion determine the local topography of the space in which they are embedded. The presence of strings has the same topographic effect to local space.