There's not a lot of enemies in Fallout 4. Will Bethesda definitely add more to the game?

I do hope they add an expansion pack that adds in a little bit of everything

From my memory, most (if not all) of the previous expansions had new enemies.

Hope for new enemies and areas. As well as companion/romance content.

Probably, at least for the bigger DLCs. With Skyrim, both Dawngard and Dragonborn introduced new ennemies, especially Dragonborn. I don't recall the smaller Heartfire DLC introducing ennemies though, but it was a "settlement"-style DLC.

I want more sentry bots... they help feed my need for fusion cores. LOL

Unless they're specific to the DLC zone they won't be adding any new to the core game. Which is how it should be....Like those [censored] take offs of American Indians in Honest Hearts....I hope they don't!!!!