Urshifu (both forms though the Water-type one seems more promising atm) and Volcarona should be major threats. I am somewhat hopeful about Slowbro just based on how it has been marketed. I think the bigger impact is going to come from the new tutor moves. Based on the two revealed so far, they seem to have a pretty high power level and depending on their distribution might just lead to a situation of 'the rich getting richer' and/or given some other Pokemon bumps in viability.What do you all think the new main threats will be when the expansion hits?
The new GMax starters might be relevant. You will probably opt for GMax Rillaboom and GMax Cinderace. Being able to bypass Disguise seems pretty relevant for Cinderace since it is already quite difficult to answer. Not sure if the others will opt for GMAX. Early Dynamax with GMax Charizard was a strategy that was somewhat popular last month. It was often paired with Curse Mimikyu and other good 1v1 mons to use the chip damage to close out the match.
Anyway there is still a lot unrevealed so it is hard to say how things will shape up in the DLC metagame.