Will there be further consolidation in this space? Probably, but I also see headwinds given how the recent mergers are viewed by government regulators and politicians. The anti-trust push back is starting in earnest across a number of industries.
Agreed, although one has to keep in mind that we're talking about a competitive landscape where you have Disney as an absolutely dominant player, created in part by the government letting them make a huge deal to acquire nearly all of Fox's assets. So it would be a bit unfair to keep smaller competitors from teaming up to take on the monster that the DOJ has already helped create. I certainly don't see the government allowing Disney to make any further acquisitions. And I don't see the second-largest player, Netflix, even wanting to make any huge deals as they prefer internal growth and maintaining their own culture. (Plus, they just struck a movie output deal with the largest independent movie studio, Sony, so no need to buy them.)
If NBCU and ViacomCBS were to merge, the resulting company would be far smaller in terms of market cap than either Disney or Netflix. And if it involved Comcast spinning off NBCU, then anti-trust critics might even be in favor of the overall deal, since it would divorce a large media company from the largest broadband/cable TV distributor in the nation. Of course, the resulting Universal/Viacom company would not be allowed to own two major broadcast nets and their O&O stations, so either NBC or CBS would have to be spun off, but perhaps with a long-term deal in place with the buyer to give next-day access to the network's primetime shows to Universal/Viacom's newly combined SVOD (Peacock/Paramount+).
Perhaps Warner Bros. Discovery would be interested in buying CBS along with ViacomCBS's 50% share of The CW, which would give WBD 100% control of that mini-network. (They currently own only 50%.) They could combine the operations of CNN and CBS News (cost-cutting synergy!) and begin putting more WB-produced series on CBS. While Peacock/Paramount+ would get in-season last-5-eps streaming rights, the entire seasons of those shows would appear on HBO Max soon after concluding.
Will all that happen? Probably not. Could it? Seems to plausible to me.