PDXcon 2019 took place in October, presumably the next one will take place around that month.. if there will be held one at all this year.If that is soon then yes that is certainly possible but if its not soon then I doubt it.
The game used to get DLCs very regularly. We haven't had anything new since Sunset Harbor which was released in March (almost 10 months ago) and Campus was back in May 2019 (another 10 months ago). This game is due something big very soon.
As you said it very well.. this game has had a regular DLC release however CS2 would be a completely new game and might follow a different schedule.