Have we had a Thursday game before?
Also, Huddersfield away on a Thursday night and then Brentford away on Saturday? 1 day off. That doesn't seem right.
So worst case scenario is something like....
Saturday 3pm: Albion v Newcastle (as currently)
Friday 8pm: Albion v Newcastle (Sky select the fixture)
Monday 8pm: Albion v Manchester United (FA Cup 4th Round)
What's happened in the past for this stuff though? Presumably Sky do still pick a game/some games for that weekend and then have to make adjustments nearer the time based on who does and doesn't progress in the Cup.