GvK Questions

Well in the prequel graphic novel, he basically forces the other titans into the hollow earth

The reason Godzilla didn't send the other Titans after Mechagodzilla was sort of explained in Godzilla Dominion. Godzilla ordered the other Titans to go into hibernation because they were constantly getting into conflict with each other and humanity and potentially posed a threat to the world. Plus, due to the fact that Mechagodzilla was being controlled by Ghidorah's brain (in a way being a reincarnation of him) Godzilla probably viewed it as a continuation of his personal rivalry with Ghidorah. 

As far as Godzilla not sending them after Kong, again it wasn't their fight. Godzilla's rivalry with Kong was a remnant of the ancient war between their two species, presumably the other titans had no part in that rivalry.

I just want to say that Dominion causes huge problems for me for some reason. 
Wasnt the point of KOTM that releasing the titans helped the world, so why get rid of them? 

its like retconning

HinikunaGoji

I think the idea was that releasing certain Titans would help the world, however there were too many Titans that were woken up during the events of KOTM and in Godzilla Dominion they were starting to get into conflict with each other (such as Behemoth and Amhuluk battling over territory) and humanity (such as Scylla attacking the military and trying to feed on nuclear weapons) to the point that they could potentially cause more damage to the world in the process. So Godzilla ordered them to rest for the time being because he was tired of constantly having to deal with them and the trouble some of them were causing. Godzilla probably only wanted to wake them at times where they were needed, which could explain why they were dormant before the events of KOTM.

HinikunaGoji,
Agreed 110%.
Godzilla sending them into hibernation was such an unfortunate creative walk back. Instead of seeing a world trying to co-exist with monsters we went back to a play-it-safe scenario. 

Ok thanks for the info