Russia, Iran and North Korea are already an "alliance" and the result is underwhelming at best. Iran and Yemen can become the problem to solve for a united Middle East (yes, Israel included). North Korea... the US soldiers from the peninsula are there to hold South Korea back, not to defend them, and one day they might decide that they have had enough, especially if the US decides to pull out the troops.

Venezuela, alongside Colombia and Brazil, will be the US's problem.

Regarding Russia... What people refuse to even count is that only the European NATO (without the US and other European countries, without pro-Russian countries, and even without Ukraine) has an army (soldiers and equipment) almost 4 times bigger than the US, and rapidly growing. Not to mention the quality of the Russian forces, equipment, and logistics. This time, the US won't be there to help them, as it was during World War II. Long story short, I'm not worried about another WW.

PS: I love your ending note. 😂