Wally West is the third Flash, a speedster from Keystone City who initially fought crime as Kid Flash with his uncle Barry Allen, the second Flash. He is the fastest character in the DC universe and is easily the best Flash.
Let's say there was a second Amalgam crossover and another company-wide crossover between Marvel and DC. Which characters from both companies should appear in it and/or should be amalgamated and which Amalgam characters from the 1996/97 crossover should return?