I dunno.
On one hand, I don't think they want to get into the territory of little baby MUTO's and repeat some 1998 cheesiness.
On the other hand, those things feeding off the missile in the trailer definitly looked like eggs, and was probably the bottom half of that glowing cacoon that was shown in the tv spot.
That, and the movie description (which might be exaggerated) says that the MUTO threaten our very existence. To threaten our existence, reproduction has to be involved, because a handful of powerful individuals might be able to trash a few cities, but would hardly pose a real threat of human extinction. You would need to have a lot of them to pose that threat.
So yeah, I don't really want a pregnant MUTO angle in the movie, and if there is one, I do hope they handle it well so it doesn't become cheesy, but I'd give it a 60/40 shot that the MUTO reproduce or pose a threat of reproducing in this film.