I will say that the one for the original Casper film is working just fine, but I check the other Casper films, and while their aren't any details on them, but doesn't reveal on what comes previous or next.
Cool found on the wikipedia "Montgomery also struck a publishing and distribution deal with Marvel Comics, which led Marvel to publish Casper titles, including an adaptation of the 1995 live-action Casper movie. Two issues of an ongoing Casper title were published in May 1997, followed by the short-lived Casper and Friends Magazine (May–July 1997)."
Will go look on w:c:Marvel for hints of this. I know Marvel loves crossovers, could be cool.
I just stumbled across this wiki. Very excited about it. However, in not reading it too closely, I've already noticed a couple of errors. Namely, Alfred (and twin brother Leon) were born in 1913, not 1914. Also, Harvey started in 1941, not 1939 and was initially founded solely by Alfred. His brothers joined later after they returned home from World War II.
In any case, please contact me at firstname.lastname@example.org. I'd like to chat about your interests.