His narration aside, Russell Crowe doesn't feature all that much in the first trailer for The Mummy. In fact we're only treated to a brief glimpse of his portrayal of Dr. Jekyll. 

Luckily, Universal has also treated us to this behind the scenes featurette which gives us a bigger look at Crowe in action. 

In particular a fight sequence with Tom Cruise, which it looks like Cruise will lose. Badly. 

There's also interviews with Cruise, The Mummy herself - Sofia Boutella and director, Alex Kutzman.