All depends on what you are looking for..

I expect a new korg pa5x later this year, musik messe might be to early
Also a New Havian could be announced
Same goes for Yamaha, a psr-s series update is due somewhere this year
Same goes for the cvp-700 series which are fullfledged arrangers inside a piano boddy
And ketron allways has a new prototype of some sorts to show..
Roland also should show something new to the arranger market if they plan to stay a serious contender in this segment

Also i think this might be the moment for arranger technollogy to make their way to more products, like workstation/synths and digital piano’s.. most likely trough further ipad integration..

Kurzweil that started to produce arrangers in recent years might actually have something serious up their sleeves..

Personally i am most interested to see if any other companies will show something akin to ketrons launchpads? Altough i think its still early for that... the only company that might do something like this could be Korg with a new pro arranger..