ToD and KOTCS
I've noticed a couple of similarities between TOD and KOTCS:
1) Both start with music that immediately announces the period in which the film is taking place--TOD, set in 1935, starts with Anything Goes, a song produced in 1934 and huge throughout 1934 and 1935 and a very 1930s dance performance with it; KOTCS, set in 1957, starts off with Hound Dog and Hot Car Racing, the song that many feel launched the Rock N' Roll era and was huge even into 1957 and the latter an activity popular amongst 1950s youth.
2) Both feature non-Nazi enemies--The Thuggies in TOD and the Soviets in KOTCS.
3) Both feature 'kid' sidekicks--Short Round in TOD, Mutt in KOTCS. Both sidekicks wear very American clothes fitting to the period--Shot Round in his yankees cap, Mutt in his leather early rock n' roller outfit.
4) Both films' artifacts are non-Christian and not very well known.
5) Both were commercial hits yet received mixed reviews.
6) Both don't start off with a separate Pre-Adventure Adventure sequence--the pre-Adventure sequences in TOD and KOTCS directly tie into and lead to the events of both films and don't exist as the final act of a previous separate adventure.
7) Both feature improbable or impossible actions and/or stunts--In TOD the parachute landing, the heart being ripped out of a man's chest and him staying alive, the mine cart jump, the straw bridge; In KOTCS, the nuclear scene as well as Mutt's vine swinging.
8) Both feature very limited to no gun play--There is only minor gun play in TOD as compared to Raiders, and no gunplay in KOTCS as compared to the limited gunplay in LC. Both feature limited whip-work, and in both cases the whip work is limited to swinging, not used offensively.
9) Both feature explorations in a dark, cobwebbed and eerie chamber of bodies--the first parts of the temple in TOD with the dead bodies and the graveyard in KOTCS.
10) Both films feature insects as the creatures the ''ick'' scene--A variety of bugs in TOD and the Ants in KOTCS, whereas in Raiders it was snakes and LC it was rats.
11) Both feature aspects of the supernatural not really tied with Judeo-Christian religious miracles--TOD features as it's main supernatural element Voodoo and Hindu ''spell-casting'', and KOTCS' main supernatural element is the Interdimensional Beings power and Psychic powers; Both are negative powers (Voodoo and Psychic power used to control and enslave one's enemy, whereas the Ark could be used to grant it's user's allies power beyond imagination and the Grail could heal and immortalize anyone who drank or was touched by it's water--More positive power).