Ok i concur i am more of eren x mikasa then eren x historia maybe after reading i guess it could be possible he wants to protects his child from getting titan power . Probably there is good chance and its pretty suspective he is really protective of historia its possible romance did blossom between them.
Eren and historia have faced losing their mother and they have deal with their troublesome daddy issue. I a do see some similarities like eren may have opened his feelings towards historia after all that happened.
I still believe eren x mikasa could prevail in the end . I do feel mikasa would feel cheated if eren never told them about historia if he had knocked her up . Mikasa would have got the wind because she hardly lives a second understanding or leaving eren frankly it would be a big plothole in the story if it turns out eren is the daddy of historias baby. But anything can happen !!
I never got the chill eren x historia get the go , even isayama potrayed more of eren working with annie than with her , heck i wouldnt want eren to be dad because i have not seen the chemistry these both characters. I would most likely see it as eren doesnt want the vicious power of titan to be passed down.