10Mbps bidirectional wireless transmission with an MCU
Have a look at ATWILC1000 from Atmel. It is a 802.11bgn "SPI network card" (or SDHC). You have to implement lwIP in your application. It should definitely work at 10Mbps if your MCU and bus is fast enough.

You could also look at TI eg. CC3100MOD (as far as I remember they have IP stack build in so I am not sure about the speed).