Sequels put the number back in the title for a reason.
A colon and a subtitle was a mood. A 2 is a product code. Audiences can read both.

For a stretch, studios were allergic to the digit. They wanted you to feel a saga, not a SKU. So we got colons, myths, dawns, rises, and one-word abstracts that meant ‘this is the same movie, please come back.’
The number returned because the mood campaign lost. People searching for a ticket want to know which chapter they are buying. A 2 is ugly and clear. Clarity sells better than poetry when the budget is $200 million.
What a number admits
It admits the first one was a pilot for a shelf. It admits the studio is not embarrassed to be in the sequel business. It also admits that ‘cinematic universe’ language wore out. You cannot universe your way out of a Tuesday night if the last one was mediocre.
When the number is a warning
If the marketing leans on ‘the biggest yet’ and the trailer is a clip reel of the last film, the digit is doing all the work. A sequel that is actually a movie will still tell you who changed. Watch for a character who cannot use the old trick. If everyone is using the old trick louder, you are being sold a reprint.
How we write sequels
We will compare the film to its predecessor, not to an imaginary masterpiece the internet wanted. ‘Worse than the original’ is not a review. ‘It repeats the third-act geography and hopes you will not notice’ is a review.
Numbers are not a moral failure. Lying about why they exist is.