Chinese President Xi Jinping has asked the PLA to prepare for war without specifying who is the enemy. China is currently engaged in intense territorial dispute with India, Taiwan and also the US.

https://www.indiatoday.in/amp/news-analysis/story/xi-jinping-tells-chinese-military-to-prepare-for-war-is-it-against-india-us-or-taiwan-1682384-2020-05-27

Noam Chomsky one of the most cited scholars in the world has been warning of a world war along with the Pope, the UK Chief of Defence and a former Deputy Head of NATO. Iran has the potential to spark such a conflict. See more in the links below.

https://the-world-times.com/2020/05/11/11-5-20-uk-chief-of-defense-staff-sir-nick-carter-warns-of-world-war-3/

https://the-world-times.com/2020/05/08/7-5-20-top-scholar-noam-chomksy-warns-of-world-war-3/

https://the-world-times.com/2020/04/29/29-4-20-world-war-3-israel-says-it-will-not-stop-attacking-iran-in-syria-escalates-military-campaign/