Is there any precedent for changing command line options after a program has been in production for some time?
Swapping "v" and "V" for editcap and mergecap would bring them in line with the other binaries for calling show_version().
And also align with the verbose option ('V') for tshark and tfshark.
(little disruption depending on how many scripts exist that use these commands)
Another approach would be to drop "-v" for version and only support "--version" as tcpdump does:
(big disruption since it's muscle memory to have Q&A people run "wireshark -v" and paste the output)
Add command-line argument to request the version to a number of the utilities.