Japan woke up this morning to the announcement of a new event, namely a Deoxys with Dark Pulse and Nasty Plot. So for a change, instead of giving moves it doesn't need to a Pokémon that direly needs some moves, they give moves to a Pokémon that has so many to begin with that they're useless already!
Of course, Nasty Plot may sound appealing on something with the offense of Deoxys-FR, but how exactly are you going to set it up? Dying from a Caterpie's Tackle isn't a good sign. Deoxys-E hardly has the best defenses ever, either, and since it's uber it hurts even more. It could allow Deoxys-LG to attack in OU, but the key to its success is spreading entry hazards like nobody's business. Even with +2 SA, it won't scare too many people, especially when its best offensive move (which is still found on less than 10% of Deoxys-LGs) lowers SA by two levels. Now watch as I'm completely wrong and it becomes bog standard on one form or the other.
As for Dark Pulse... well, it already has Shadow Ball, and these moves are as redundant as it gets. So I'm pretty sure this is not going to change a thing to how Deoxys is played.