I suspect we can't afford all of those guys without selling. If need be, sell Walcott and bring in Reus. If Reus fails, then Griezmann. It's a bit of a football manager fantasy, but they're both significant upgrades (would maintain Walcott's scoring, while also adding more playmaking), and can both legitimately play as strikers when needed. Also tie down the entire first 11 until at least June 2017.
We spent a lot of money last year, and part of me suspects we are spending a year in advance of relevant cashflows. We need to be bold but we also need to be realistc