How do you structure that, so that investors can have the option to invest in only one or two particular products, and not just in the corporation as a whole?
If you are the sole leader in the startup, and cash is tight, this is going to be tough.
If you have capable leaders to delegate to, and have a sizeable warchest, this is possible to carry off.
The only way I can see multiple launches working is to have each treated like its own company. Each has its own leader, staff, budget and success/failure criteria in a specific period of time. You act as the cheerleader, focuser and resource-getter for each 'general'.
Trying to do it all yourself will lead to exhaustion.
