Walt Disney

Walt disney was founded in 1923, however its logo was not introduced in its movies for another 62 years until 1985. This shows the lack of importance logos had when video presentation first came out. Before that a simple "Walt Disney Presents" was enough and was found at the start of their movies. The original logo was (the one off to the left) given a more artistic revamp in 2006 which included using a new intro with a new CGI animation with a very complex depiction of the Cinderella Castle and its surroundings. This gives a very welcoming and family feel to the movie that is about to screen, and the realization that the movie is acceptable and appropriate to children as well as adults. It was a clear change from the old blue and white intro with its stylized castle and 2D animation, that will stay in the minds of anyone born from 1985 to 2000. The new logo was first used on Pirates of the Caribbean: Dead Man's Chest. As of 2011 the "Walt Disney Pictures" on the logo has now been shortened down to just "Disney". This shows that the company has changed its name on its logo 3 times throughout the ages. From "Walt Disney Productions" to "Walt Disney Pictures" to "Disney". 

Universal Studios

Universal studios was first founded in 1912 but did not release its logo until 15 years later in 1927. This original logo featured a plane flying around a spinning globe. It has since been updated to include CGI animation of a more detailed earth. The way the logo is set out depicts some form of dominance over the movie world. Most people in the Western world would have seen a Universal Studios movie and therefore will know the studio. They have had time to promote themselves as they are the second longest running movie company. They also are widely known to have opened up their studio in hollywood and turned part of it in to a theme park. The fact that it highlights the Earth by itself with stars in the background shows how it recognizes other film companies existence but the fact that the logo takes up the majority of the screen represents that these film companies haven't had nearly the amount of legacy or experience as Universal studios has. 

Summary

Overall general commonalities can be seen between most logo designs. The normal is that the text seems to be large and noticeable to pull the audiences attention. Another is that the always seem to show the sky if they have a background. Wether its the horizon, clouds or space it shows that the company is larger and bigger than life. The logo also doesn't and is not meant to specify a specific genre as it would limit the company to which movies it can make. However when watching movies from companies like Disney and Dreamworks, you can overall assume that they would be suitable for younger viewers and would not contain that much, if at all, any profanity or inappropriate scenes.