I'm not sure about the last part coming true. But one thing is true about winning the lottery and the NFL draft alike: You can't win if you don't play.
If by some miracle the Packers somehow managed to mine a gem during the upcoming draft, for example, that would be a good problem to have. However, it may take 3 or more years to realize that. First then would they need to worry about who is the best QB to keep.
Finding a quid pro quo replacement for Rodgers is going to be difficult enough as it is, even if they were to draft nothing but QBs over the next five years. Regardless, they may whiff no matter the round. Looking at all the first-round QB flops over the years and it is a sobering thought. Jerry Tagge and Rich Campbell for GB, just to name a couple. Brian Brohm was not so hot in the 2nd. A seventh beat him out for a roster spot, after all.
Personally, I hope TT does not wait 5 years to begin his search for Rodgers replacement since it could likely take many years of searching just to get reasonably close.
This discussion began with a question about succession, which is a very specific consideration, and you keep interjecting thoughts pertaining to the general issue of QB development which is another issue.
You said, "however, it may take 3 or more years to realize that first then would they need to worry about who is the best QB to keep" and added a comment about a "Rodgers quid pro quo".
Are you suggesting the possibility that some low round QB who's not likely to see any playing time could be competing with Rodgers for a job in 3 years, when Rodgers is 33? That would be ludicrous. Or are you saying that guy is supposed to sit on the bench for 7, 8, 10 years and then suddenly emerge as a quality starter as Rodgers enters retirement? That's equally beyond plausibility.
For the next 5 years it's about developing backups who, under the best of circumstance, are serviceable when called into duty. If there happened to be two of them, glory be, one might be trade bait in the Wolf style.
As far as first round QB busts go, they're frequent and well noted. However, there are 20 times as many low round draft picks or RFAs invited to camp who never make it as even a serviceable starter. And if you scan the list of the passer rating leaders it's heavily populated with first round picks. The odds of finding a franchise QB in the first round are far greater that getting one out of a low round. Should this even need to be said?
Getting even further into repetition, if a developmental backup QB drafted this year shows promise, in his 5th. season he'll be out the door as a FA because he'll want the money and a shot at starting with another team...just as Flynn did...because Rodgers will be 35 and likely good for a couple more years and that backup guy is beyond waiting.
Optimally you'd want a developmental guy ready to go in his second year, third year at the most, or you risk seeing him go to seed.
Of course, Rodgers could suffer a series of concussions and feel it best to retire prematurely. If there happens to be a serviceable guy on the bench, that would be a happy circumstance. But that's not succession planning, which is what this was about.