Here are some of the boxart of upcoming kits that are releasing this month.. Of course it's not that less, I will add on more once more boxart are release lol...
*Update 3 April 2014: Updated all with exact release dates and details on HG Cross Bone Moah.
Links and images from Gundam Guy blog post
SD BB Full Armor Unicorn Gundam (Release date: 17th April 2014)
HGUC Full Armor Unicorn Gundam (Destroy mode) (Release date: 17th April 2014)
SD BB Sengoku Astray Gundam (Release date: 10th April 2014)
RG Gundam Exia (Release date: 26th April 2014)
HGBF Cross Bone Gundam Maoh (Release date: 10th April 2014)