The photo in this month's Empire was actually for a 'Where are they now' feature. Seemingly the only way that all the cast (as well as Donner and Spielberg) got together was because Spielberg was guest-editing that month's issue (celebrating it's 20th anniversary). The interview that accompanys the photo is a jovial one with all those present remembering the film fondly and joking about it with much good humour. However there are no serious indications that a sequel is anything but a rumour and something that most of the original cast would seem very happy to be a part of.
On a side-note I have religiously bought and read Empire every month for the vast majority of its 20 year life and can honestly say that the current issue is by far the best one yet (largely due to the influence of its guest editor). Other delights within include a very impressive photo gallery of stars 'reprising' some of their famous roles (Hopkins and Forster together again! Christian Bale with his American Pyscho axe! Unforgiven's Eastwood and Freeman reunited! Nicholson with a Joker-like grin!). Beg, borrow or steal a copy if you can!