I'm not usually that guy, but honestly, I'm not optimistic about Monday's announcement. No matter what they do, modern will probably be in a poor place.
Before companions turned modern on it's head, there were already massive problems with the format, mainly Uro being in a massive amount of decks and every Gx deck running Veil of Summer at 2-4 copies. These problems just got coverd by a "companion-layer" of problems. They are still there.
If they ban Lurrus, Yorion will take over. If they change the companion mechanic, I find it highly unlikely that they'll actually get it right. In any case, if they nerf them enough, modern will just revert back to an Uro/Veil format, which was complete and utter garbage.
This is a weird, very bad place modern is in: Apart from the very worst ones, problems that have come with pushed print after pushed print havent really been resolved. Starting to ban cards or even just nerfing companions will be like peeling back layer after layer of a rotten fruit. I'd say there's about 3 layers worth of %$#% around a balanced, fun modern format.
And I have absolutely zero confidence that WotC will get this right. Not in a week, and not in a year. MTG is developed too far into the future. The ship on several new sets has already sailed. So realistically, we are looking at years until we can expect them to correct course. My guess is many people won't stay that long.
With those who do stick around, WotC will know that they can do their absolute worst and they still won't lose those players. No offence but IMO if people want modern improved they should boycott the living %$#% out of new MTG product. Skip standard, skip draft, skip Arena, skip money-grabbing masters sets, and give Maro and development a good cold shower.
In a free market economy, if somebody makes a bad product and then refuses to improve it despite loud, clear negative feedback, they should fail and go bankrupt. Irrational emotional attachment makes stuff survive that really shouldn't and that kind of takes the incentive away to really try and make something good.