(This is the monsterverse version of the crossover alternative universe to the high school dxd, and yes, their lore will be connected but will be different don't take this seriously as cannon for this is only for entertainment. So enjoy)

Eons ago, before the creation of man after animals were created emerged the titans' ancient giant animals that would roam the earth the hollow earth would be the birthplace of their home would be in the deep within the earth that would connect them to the surface. But after the origin of sin happened, things will change around the earth, though the titans didn't care about the changes they only cared about their planet being safe. Though in the great war between the devils, the fallen angels and angels would also cause the great titan war the scar king would want to take over the surface and fight against the godzilla species with the kong species against them causing the rivalry of godzilla and kongs to be eternal then godzilla would trap the scar king and his subordinates in the depths of the hollow earth leaving titanus shimo to handle them though it went terribly wrong. And centuries still going the war will still happen due to the arrival of ghidorah that wasn't part of the natural order the three factions and the dragons there was not part of them that fell from the stars. They and the titan godzilla, Mothra and rodan fought against ghidorah almost losing but godzilla trapped him in the artic grounds of Antarctica trapping him there forever. Now generations will come and the titans still didn't see the factions as allies having a trice that one will stay in the surface and the other in the underworld that's near the hollow earth. And time passes to now this is where it will begin again

in 1954 in the bikini castle bravo nuclear test it wasn't a test but to lure godzilla to a trap but was supposed to be a trap ending the last one was a new beginning for godzilla on his evolution