Wow, as a corgi owner this card is really cool! I have zero knowledge about Magic as I found this post scrolling randomly. I would really like to have this card. Is there any way to tell if this is going to be expensive?
There's no real way to tell, but I'd say this is probably not going to be powerful in the formats in which it will be legal, which indicates that it will be a build around commander card. In other words, I think it will be fairly inexpensive. It will be widely available on card kingdom and TCG Player (or whatever your regional card buying websites are) on June 7-14.
If you wanted to make a deck around it for fun, I'm sure some MTG youtubers will make a budget deck tech for it, probably in the $50 range for the whole deck. They may also make a play mat available through Ultra Pro, if you wanted a larger version of the art for about $20, but That is not guaranteed.
EDIT: not my best work, but here's something I threw together for about $30 before shipping https://www.moxfield.com/decks/UG1b-4h7NkilnSzYnKUeMw
