Honestly, this post blatantly reveals you are either a) full of it, or b) got bad info. "The amount of wealth Netflix had available." You serious Clark?
I've talked about this on this forum over the years and don't want to go through it all again. The short answer is NO, Netflix and Amazon won't be bidders for the Big 12's TV package. That is not their strategy and they have said, on record, they aren't pursuing live sports rights in any significant way. Amazon's foray into the NFL/FPL/etc. was highly targeted and they have said they don't anticipate expanding their sports rights significantly.
Big 12 is deeply invested in ESPN, and ESPN is deeply invested in the Big 12. All should expect it to stay that way, and should expect the Big 12 will get lots of money in return for our tv rights. You should also expect more and more content to head to ESPN+, just be ready.