I'll be speculating you'll be speculating he'll be speculating we'll be speculating you'll be speculating they'll be speculating
Future perfect
I'll have speculated you'll have speculated he'll have speculated we'll have speculated you'll have speculated they'll have speculated
Future perfect continuous
I'll have been speculating you'll have been speculating he'll have been speculating we'll have been speculating you'll have been speculating they'll have been speculating
I'd be speculating you'd be speculating he'd be speculating we'd be speculating you'd be speculating they'd be speculating
Past
I'd have speculated you'd have speculated he'd have speculated we'd have speculated you'd have speculated they'd have speculated
Past continuous
I'd have been speculating you'd have been speculating he'd have been speculating we'd have been speculating you'd have been speculating they'd have been speculating