"Brewing conflict" means that a disagreement or problem is developing and becoming more serious or intense. It implies that tensions or issues are gradually building up and may soon lead to a conflict or dispute. Full definition
Half of this final Dawn of the Planet of the Apes trailer is all about brewing conflict and watching humanity further lose hold on the planet. (slashfilm.com)
Kevin Burns, a Calgary author and corporate trainer, recommends you start by talking with you new staff, both to iron out any brewing conflicts and to «remind the team that you're still one of them.» (canadianbusiness.com)
The effect from the brewing conflict on oil is murky, but for now it is not having a bullish impact. (oilprice.com)