Sadly this might be the last Underworld until Reboot.
https://www.youtube.com/watch?v=-Y74du0Ex_g
That is the latest trailer, and here are boxoffice.com predictions for Underworld: Blood Wars.
http://pro.boxoffice.com/long-range-forecast-underworld-blood-wars-amityville-awakening/
That is significantly lower predicted gross for Blood Wars despite higher ticket prices than Awakening, and by the looks of it Blood Wars looks to be a better film.
17M Opening Weekend with a 42 Million dollar domestic finish isn't good at all. So why so low? Well Screen Gems has done an awful job marketing this one and putting it in the first half of January is a mistake with Rogue One still looming in the market. Let's not forget MOST films that aren't award worthy will do badly up against any STar Wars film.
As for foreign audiences saving Blood Wars, don't count on it, none of the previous 4 did that well outside of America.
I hope I'm wrong though and this exceeds expectations but I highly doubt I'm wrong.