"It was almost not happening," said Söderlund.
It was just something as boring as resources and availability. The DICE guys Karl-Magnus [Troedsson] and Patrick [Bach] were talking and I told them we were in dialogues with Disney over this deal and they just looked at me and said, 'why haven't you spoken to us? What are you doing? We want to make Battlefront'."
Söderlund went on, "DICE is a very particular place and they are very proud of what they do and you don't really tell them what to do. I didn't anticipate them wanting to work on a license - they've always been new IP or their own IP. But they were just like, 'we would kill to make this game' and the whole studio started talking about it like, 'please give us this game'."
Source
In case you missed it, here is the Star Wars Battlefront teaser trailer from E3 2013.