Read comic: Batman/Lobo: Deadly Serious

comic
Summary:

Batman, transported to an alien vessel by a mysterious figure, is asked to help cure a plague that has infected its inhabitants. Lobo, who has also been shanghaied, finds himself in the same boat. Now, Batman and Lobo, two incredibly unlikely companions, must somehow find a way to work together and find out the real reason for their abductions — before they kill each other!