Regarding your last question: the movie will be screened with the original Japanese dub and English subtitles.

No, not even close. Shippuden isn't likely to end until Spring of 2015 at the earliest.

1. If you want to catch up quickly, just read the manga. Honestly, it's more satisfying with far superior art and pacing anyway. 2. The plot of the movie will certainly spoil some aspects of the series if you haven't completed it yet, but it doesn't rehash or summarize past events that haven't happened in Shippuden…

According to Japanese site My Game News Flash, the boy's name is "Bolt" ("Boruto," which is a pun on "Naruto," which can mean "maelstrom" in Japanese) and "Himawari," which means "sunflower" in Japanese ("Hinata" can mean "sunny place" in Japanese).

FYI: Neji's name means "screw" in Japanese, and Boruto is not just meant to be a pun of Naruto... It's the Japanese phonetic way of pronouncing the English word "bolt". In short, Boruto is (indirectly) named after his uncle.