Like the title says I am thinking about Destiny's Beta and from the information I have culled from others, it seems the beta points to July. Why? Well Bungie's day of awesomeness, Bungie Day, is in July and DeeJ has stated about a cool thing(s) happening that day. Could it be the release of the Beta? Again, it seems POSSIBLE. Personally, I think if the Beta does in fact happen in July it would probably be early July, because a public beta is designed to give developers a chance to see how their build runs with the estimated amount of people on it that would be on it daily. Also to see how their engine runs on the consoles as well as, and more importantly, their servers handling the influx of new guardians.
A public beta is designed to find any possible problems that could arise if the build would be released, and handle the estimated server traffic. So how long would the beta last? Reach's public beta lasted about a month and half if I remember correctly, so expect Destiny's to be about a month which would end sometime, POSSIBLY, in August giving another month for Bungie to clear out all the remaining bugs from the Public Beta build to go gold(release) in September.
Remember this is all speculatory and I would love to hear from you on your thoughts. Keep in mind, till E3 whatever we say here is heresay and not to be taken seriously. The information I provided is my experiences with game development (I have made a couple text based adventure games, as well as working on another), and what I know of about Destiny information.
I included a poll to see what everyone thinks COULD be the Beta Date.
Remember be cool and keep on gaming.