Here is some parts of the announcement:
We look forward to further growing Opera GX and to driving the growth of GameMaker, making it more accessible to novice users and developing it into the world’s leading 2D game engine used by commercial studios. We are also thrilled to find future synergies between YoYo Games’ products and Opera GX.”
We have always had big plans for improving GameMaker across all platforms, both from the perspective of improving accessibility and further developing the features available to commercial studios
And now here is some speculation. It sounds they want more users for GMS, making it more accessable. How they are going to approach this is open question. GMS drag and drop is approachable and overall as product I think it's really easy to start with. Making more accessable for novice could be how they can get GMS, which people assume would be subscription model of payment, making cost of using on long run. Now this is one way of thinking and doesn't necessarily this would make it more accessable, as it could also mean 'longer' commitment, which could also make it harder for novice to do. As single payment is large upfront cost, but doesn't have any longer commitment after it. Which one is better is up to people. What I am saying, purchasing model means different levels of commitment, which can make it accessable for others, but can also scare away some others.
Changing to subscription could mean zero-net accessiblity gain, therefore I think they mean something different by "improving accessiblity", though I would like to hear more about it.
As further speculation, maybe accessiblity could mean free browser-based "GMS Lite", where you can create games with light version GMS and 'directly' publish them to online platform as playable HTML5 games. Maybe here comes the synergy with Opera GX, GMS lite could be optimized (or only) for this browser and platform where you could export games would be Opera's own gaming platform. But this could mean lot of work, and making GMS browser (although 'lite') could not be viable.
On other hand, it also states synergies between YYG's products and Opera GX, now what are YYG's products? GMS obviously, but are there some other things which I am not aware of? Also the YYG products can be future products, for example YYG publishing games. Not necessarily HTML5 games, though I think it could be larger portion of it.
In the announcement I also liked the words about further developing considering commercial studios, so they are not only targeting gathering new novices. Though as you can see mention of "leading 2D game engine", I don't think they want expand much the 3D capablities. I would like to hear, what features they want to develop further. Just as a side-thought, maybe they could separate Drag&Drop to my previously mentioned browser based GMS lite and the 'normal' GMS would only be GML based, and have further development. Isn't that currently whatever you make in GML is pretty much doable in Drag&Drop?
So to end my thought, one shaky prediction would be separation of GMS to browser-based "lite" with Drag&Drop and some GML functionality, and further developing 'normal' GMS to appeal professional users.
Edit.
Let's keep the wild speculation low, please.
Whoops sorry