Alton / BPB definitely coming to, I think soon after they are both open as people are gonna be keen to ride them.
Poland - I agree that if it keeps getting put off then we will never get round to it, so perhaps putting in a provisional date for later in the season is a good idea, and keeping check on the status of the Hyper.
Not fussed about Toverland. Liseberg is a maybe, if its a day trip and I can get a cheap enough flight. I'll see nearer the time.
Also a maybe for Denmark, depends on which parks and also how much money I still have for trips later in the year, because if Poland does happen then i'd prioritize that.