Fantastic Four and L.O.T are not the same. The Thing is a huge bulky rock like character who's power is super strength and that a resistance to pain, there is no character in my knowledge who fits that description well at least rocky and big. Next up is Human torch the closest to him is Firestorm but they are different. Human torch is just himself and when he flies his whole body sets to flame and he can throw fire that's it, Firestorm is a mixture of two beings one of them being smart when he flies only his hands set to flame and on a side note he can change things to other things(dumbed down version for the younger viewers) and they still have mental connections when split and a bit farther is Heatwave who just has a specialized weapon that shoots fire. Next up The Invisible woman like the thing I have no DC hero connected to her unless you count the camouflage feature on black lightning's suit which wouldn't be accurate. Last but not least mister fantastic the only character from DC related to him is the elongated man who is not even in L.O.T he is in The Flash they basically have the same power except The Elongated Man can make himself look like other people and he hasn't even made an appearance on L.O.T not even on crossovers. The teams in general are different The Fantastic Four are always gonna have their four character but L.O.T is constantly losing an average of 2 characters from each season and gaining that same amount back(more or less). Also TF4 focus on present time earth and their identities are very well known but L.O.T is only known about by the Time Bereau, Supergirl,The Flash, Arrow, and Constantine and protect earth throughout time and they do it in secret they erase people's memories to make sure they are not known they protect time itself. Therefore L.O.T is not only not the same as TF4 they are better.