The moment the price goes up a lot, all miners will continue mining and find blocks faster until the next difficulty adjustment. That's the scenario I'm hoping for

But if that's happening, the first Block mined in 2020 will be higher than now. Best for you (and me much more since my prediction is even lower) would be a decreasing Bitcoin price, that miners will leave the network, hashrate will decrease and less blocks produced per 2016 Block interval.
Correct. Except for my hopes for a higher Bitcoin price outrank my hopes for winning this educational giveaway
I'm always bullish.