Kendos_Kenlen [1] filed a request to merge intellij-idea-15-ultimate-eap [2] into intellij-idea-ue-eap [3]:

Package are the same (except that intellij-idea-ue-eap cover all EAP, not only the 15th). This package is useless since it cover only one version (and isn't update).

[1] https://aur.archlinux.org/account/Kendos_Kenlen/ [2] https://aur.archlinux.org/pkgbase/intellij-idea-15-ultimate-eap/ [3] https://aur.archlinux.org/pkgbase/intellij-idea-ue-eap/