It will be the first time that Bilic has faced the Irons as a manager and revenge for his disappointing dismissal could well be on the menu when he brings the Baggies to east London on the weekend of 25 January.
Understandably, some fans were happy to be welcoming Bilic back after his contributions to the club as a player and a manager, but others felt more nervous about the cup tie as, well, this is West Ham and we all know what might well and probably will happen.
Here’s the pick of the reactive Tweets to the announcement…
Welcome back Slav – we will smash em ⚒
— Dan ⚒ (@danbeatles78) January 6, 2020
Welcome home Slav!! Let’s go Hammers! #COYI
Looking forward to welcoming them to our great home
— Fan of the Board (@LoveGoldnSully) January 6, 2020
— Graham Walker (@hammers060280) January 6, 2020
— ⚒ Ian Lewis ⚒ (@enlewus) January 6, 2020
I think we all know how this will pan out
— ⚒vin⚒ (@vincefowles) January 6, 2020
I hope he doesn’t come back to haunt us. pic.twitter.com/2VDfqHYz3p
— Jamie (@jamiewhusteele) January 6, 2020
We’re getting knocked out
— Neon (@MattyC_533) January 6, 2020