So there are realistic Iron Man suits available in the…
Have you ever seen a carnivorous animal bigger than a Lion I guess not. Here is Liger bigger than a Lion and fast as a tiger. Ligers are a hybrid of a Lion (Male) and a tigress. They are larger than their parents and they have similar genus but they are of different species. They are different from the similar hybrid tiglon. It is the largest of all known cats and extant felines.
Ligers enjoy swimming which is a characteristic of tigers and are very sociable like lions but are more likely to live past birth than tiglons. However ligers may inherit health or behavioural issues due to conflicting inherited traits, but this depends on the genetic traits of the parents. Ligers exist only in captivity because the habitat of the parental species do not overlap in the wild. Notably, ligers typically grow larger than either parent species.
Here is a video of a Liger named Simba.