No, Titanic was shot on Super 35 as well, but is considerably more detailed. Also you can’t pull out detail that isn’t in the negative, and as the remastered bluray is more detailed it shows there is full 2K resolution (or close to it) in the negative even when cropped. That’s what you expect with Super 35 really as you’re not using the full are of the film for picture, films shot that way tend to use the highest resolution (finest grain) negative film stocks available. The film was shown on 70mm as well, so they must have been able to pull out more detail for the 70mm prints. So the low resolution isn’t due to the negative itself, it’s due to the choice of film stocks used for the prints as well as the intermediary process.

If you ever get to see the film on 35mm, and there will be places showing prints, you’ll see that compared with other 35mm films it’s on the lower side of detail and resolution. You’d think because it was a highly anticipated blockbuster that it’d be on the higher side, but that just isn’t so.

Anyway no digital distributor would ever release it looking the way it did on 35mm, it doesn’t look “bad” by 35mm standards, but it’s certainly soft and low resolution, probably about 1K detail. True Lies is probably similar to the detail in T2, but I haven’t seen that projected in a cinema.