I dotn know if this topic exists already, but lets try to collect everything together. Ill start with:
MAD cartoon
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fi13.photobucket.com%2Falbums%2Fa277%2Flovegunner%2FBatman%2Fkeatonmad.png&hash=53ecbd0b974e3e65e44216098ca3b49547899fbf)
Tiny Toons
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fwww.vegalleries.com%2Fcomiccon%2Flooney%2F71552.jpg&hash=1f24b650c6f9395c6d6d2531b8b90c23c5aa498d)
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fimages1.wikia.nocookie.net%2F__cb20101221095647%2Fbatman%2Fimages%2F0%2F0c%2FTinyToonsKeatonBatmobile.jpg&hash=2d6adf3f7af44291b0697929b235081deb632894)
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fi13.photobucket.com%2Falbums%2Fa277%2Flovegunner%2FBatman%2Ffg.png&hash=01c0d270376199b7ee7c158905aaa846767f01c6)
Nicholson's Joker in South Park
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fpics.livejournal.com%2Flisbuff%2Fpic%2F00095rg2&hash=85766766e68f1dacc53cf57a9b6a65dddd6da19c)
American Dad scene showing grabbing a sign, breaking a glass and creaming "you wanna get nuts? cmon, lets get nutsss"
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fi13.photobucket.com%2Falbums%2Fa277%2Flovegunner%2FBatman%2Fletsgetnuts.jpg&hash=74f5aeb78ed8564c54d24ac30e448a8f142f086d)
Simpsons
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fi13.photobucket.com%2Falbums%2Fa277%2Flovegunner%2FBatman%2Flastexittospri.jpg&hash=71e8210a03d86342dba21d277634bb30d7405d30)
Here's George Costanza doing his take on Keaton (the last 10 seconds)
http://www.youtube.com/watch?v=d-MtW7hbzWk
Quote from: GothamAlleys on Tue, 17 Jan 2012, 20:23
Tiny Toons
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fwww.vegalleries.com%2Fcomiccon%2Flooney%2F71552.jpg&hash=1f24b650c6f9395c6d6d2531b8b90c23c5aa498d)
(https://www.batman-online.com/forum/proxy.php?request=http%3A%2F%2Fimages1.wikia.nocookie.net%2F__cb20101221095647%2Fbatman%2Fimages%2F0%2F0c%2FTinyToonsKeatonBatmobile.jpg&hash=2d6adf3f7af44291b0697929b235081deb632894)
I remember this Tiny Toons episode from 1992-93. I haven't seen this caricature of Batman since more than 15 years ago. Great thread, keep it up!
I collected my favorites in my blog - http://gothamalleys.blogspot.com/2012/01/media-references-part-ii-tim-burton.html (http://gothamalleys.blogspot.com/2012/01/media-references-part-ii-tim-burton.html)