Lizard? I don't think so. Solomon Grundy has gone toe to toe against Superman and WW. Lizard is quick and agile, and probably has a strength class somewhere around class 15 to class 20 now. Last I heard he was a class 12. Grundy is probably a class 100, and pretty much hard to kill, since he already is dead. I don't see Lizard pulling this off. One slip, and its all over for the Lizard.
The Lizard is not even in Solomon Grundy's class level. Even the cartoon version of Solomon G is beyond the Lizard, and the comic book version of Solomon is just on a whole other plane when compared to the Lizard. The Lizard would literally be ......well ....a lizard!