Conveniently ignoring the fact that Kone and Traore were both injured when Lukaku went down, aren't you?
If Kone stays on the wage bill, presumably Martinez thinks he can contribute. And it's been suggested that he's very keen on bringing Traore back again. If those two are both fit and Lukaku returns, why would you sign a big-wage striker for £8m+ in preference to bolstering a different position, where there might be less depth?
I believe we'll only get one of Lukaku and Remy in, because:
1) most of the time we play a lone striker
2) we aren't going to splurge a huge amount on several signings - Martinez is going to work the loan market for all its worth.
3) We already have Kone and Naismith, and we've no chance of shifting Kone to anyone else.
4) In light of the above, it would be pointless having one or other of Lukaku and Remy on the bench every week, in turn leaving Kone and Traore not even in the matchday squad.
Just my hunch.