A window of opportunity is an article in Resident Evil Recollections. It was uploaded on 28 July 2016.
Fisher has met an untimely death, but there's no time to grieve for Chris and Sheva as they're spotted by the guy in sunglasses (no, not Wesker) and thrown right back into the fray.
Usually you'd take out the sunglasses Majini only after the Executioner has smashed down the gate and widened the battlefield, but it's actually possible to take him out beforehand. This is for those of you who want to waste no time in avenging Fisher!
Sadly nothing in the game changes no matter if and when you take him out...