The collision itself will generate heat. And a super continent with less water will also absorb more heat energy without having water near its center.

Mammals’ Time on Earth Is Half Over, Scientists Predict https://www.nytimes.com/2023/09/25/science/future-earth-warming-mammal-extinction.html?unlocked_article_code=i-Vz9jIKNFOAz9W461kSfuXdwSaNLqY1OA6-RZUjsXXCFqdC3ZYi5fzATecJES9S5U55iemPY0VVELjOxBte3G2-M5XW3LZ5x0wuvCGDe85590sumzR9EYMPibkT_EUEnWQ65UT0fgYejXoFiqiwwLPaO5VtNWlz187tW6MRjycS3Q4iSAbvCHj4Ga9QI6WR-xod26K-0yKDaHB_iqod3s9o3MBh722dNZmHIUBcVwG_iJ-ocfLFLQFJrSs2kS0JihLKWpETwiCd9EcgcbwCh58HVCY1sN0wg-wX1ThT0TbY5CZCdDXsKwQYsG-F6efLTTF0aSaRxIudb1g9WoWdhmRF4NBChEigjxDOJO2NM2Y2&smid=nytcore-android-share

When the tectonic plates collide again to form another supercontinent, it will create enough heat to kill off most, if not all, mammals. And it will happen before the sun destroys everything, probably in around 250 million years or so.