It is likely. However Bungie originally intendted for Valhalla to permanently replace Blood Gulch, but maybe fans will cry out for justice.
I would say that Valhalla is a good enough substitution for Blood Gulch. Check out this quote, if you substitute Sidewinder for Blood Gulch, it pretty much fits it.
This may turn out to be like the Guardian/Blackout situation. Bungie will not make a map pack with Blood Gulch unless people beg and beg again for it to be in Halo 3, like Lockout was. However, I think Valhalla is a much better substitution to Blood Gulch than Guardian was to Lockout, even though both of the newer maps in both of these comparisons were what I considered "Spirital Successors", and this would make it unlikely to be in a future map pack. On a different note, I just realized that I typed a big paragraph :squirrel_chatting:.
you do realize that in terms of remakes...they're the same thing as it'll be different from either anyway? --- anyway besides that, I think that Valhalla is definitely a closer remake than Guardian was. With that, and Sidewinder since sidewinder doesn't have the connecting hallway anymore, you've got your vehicle based maps. I just think that the only part I dislike about Valhalla is the size of the hill in the middle. It makes coming from lake-side, especially in a vehicle, very difficult. The map just feels kind of unbalanced as far as routes go.
I was a fan of Containment myself. Very Few people like this map and I highly doubt it will be remade. Besides that If I had to go with a new re-make Headlong wins my vote.
Oh crap, I forgot about Standoff. So, no, there will not be another more open map like Coagulation because there is already Valhalla and Standoff.