Deinosuchus would make a great addition to the game. Deinosuchus would be an Epic level creature, what would set it apart from other crocodylomorphs in the game is that its more viable and has better performance in fights.
Its base stats could be as followed, high attack followed by decent health with around 10 - 15% armor, its main drawbacks being slow speed and having a low critical chance.
The game already features many crocodile relatives (sarcosuchus, purussaurus and gryposuchus), it wouldn’t really make sense to exclude deinosuchus and wouldn’t take a lot of effort to make either! Just modify purussaurus’ skull, play around with the color scheme and you’re golden!